User talk:98.220.103.2

I believe that "per" means a rate.

If I say 10% am I saying "10 parts per 100 parts" or "10 parts of 100 parts"?

Is 10 parts per 90 parts equal to 100 parts? Is 10 parts per 100 parts equal to 110 parts?

When I say parts I of course am talking about common unites.

Can one average percentages? Can one average rates?

Mwdar (talk) 18:46, 3 January 2020 (UTC) mwdar